Earplug



FIG. 1 is a front elevational view of an earplug showing my new design, the rear elevational view being a mirror image thereto;

FIG. 2 is a left side elevational view thereof, the right side elevational view being a mirror image thereto;

FIG. 3 is a top plan view;

FIG. 4 is a bottom plan view; and,

FIG. 5 is a perspective view thereof. 

The ornamental design for an earplug, as shown and described. 